Certain networks have different standards as to what they will censor. Some will leave a good bit of "offensive" (not saying mine joke is offensive) content in, while others censor simply ridiculous things.
Another consideration is "editing for time" / usually indicating if it is prior to the start. If you are trying to get a 2:09:00 film to fit into a 2:00:00 time slot, lines/shots/scenes get trimmed or outright omitted. I suspect cutting the mime joke is more a result of editing for time. It may seem insignificant as far as the amount of time cut, but every second counts & if you really need certain scenes & dialogue to stay in the film for story purposes, it's much easier to cut a sentence (or even a few words) from several scenes throughout (throw away jokes, one liners, reaction shots etc) as they can be removed without altering the bulk of the plot.